In our simulations we use one motor molecule (see Figure REF  for its description) imbedded inside a medium constituted of 1760 linear molecules, in a parallelepiped box \(31.1\)  Å wide and \(62.2\)  Å high.
After aging the simulation box during \(10 ns\)  at the temperature of studies, we create the pore by suddenly freezing molecules located at a distance larger than \(R\)  from the center axis of our simulation box.
This procedure is intended to minimize the structure modification of the liquid by the confinement.
After their sudden freezing, the glassy molecules of the pores are no more allowed to move, leading to pure elastic interactions with the confined liquid.
Consequently the liquid temperature is not modified by the interactions with the pore walls.
After that procedure, as the dynamics changes with the confinement, the liquid is again aged during \(10 ns\)  before the beginning of any study.
We integrate the equations of motion using the Gear algorithm with a quaternion decomposition[1]} and a time step \(\Delta t=10^{-15} s\) .
When the motor is active our simulations are out of equilibrium, because the motor's folding periodically release energy into the system.
However our system is in a steady state and does not age as explained below.
For that purpose we use the Berendsen thermostat[2]} to evacuate from the system the energy created by the motor's folding.
Notice that the thermostat applies to the medium's molecules but not to the motor. Thus the motor's cooling results only from the molecular interactions with the medium's molecules.
We use the NVT canonic thermodynamic ensemble as approximated by Berendsen thermostat (see ref.[3]} for an evaluation of the effect of the thermostat on our calculations), and periodic boundary conditions.
The molecules of the medium (host)[4]} are constituted of two rigidly bonded atoms (\(i=1, 2\) ) at the fixed interatomic distance  \(l_{h}\)\(=1.73 \) Å\( \) . These atoms interact with atoms of other molecules using the following Lennard-Jones potentials:
\(V_{ij}=4\epsilon _{ij}((\sigma _{ij}/r)^{12} -(\sigma _{ij}/r)^{6}) \) 
